CVE-2019-13263

D-link DIR-825AC G1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. A DHCP Request is sent to the router with a certain Transaction ID field. Following the DHCP protocol, the router responds with an ACK or NAK message. Studying the NAK case revealed that the router erroneously sends the NAK to both Host and Guest networks with the same Transaction ID as found in the DHCP Request. This allows encoding of data to be sent cross-router into the 32-bit Transaction ID field.

D-link DIR-825AC G1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. A DHCP Request is sent to the router with a certain Transaction ID field. Following the DHCP protocol, the router responds with an ACK or NAK message. Studying the NAK case revealed that the router erroneously sends the NAK to both Host and Guest networks with the same Transaction ID as found in the DHCP Request. This allows encoding of data to be sent cross-router into the 32-bit Transaction ID field.

Los dispositivos D-link DIR-825AC G1 poseen una Compartimentación Insuficiente entre una red host y una red invitada que es establecida por el mismo dispositivo. Una Petición DHCP se envía al router con un determinado campo Transaction ID. Siguiendo el protocolo DHCP, el enrutador responde con un mensaje ACK o NAK. Estudiando el caso de NAK reveló que el router envía erróneamente el NAK tanto a las redes Host como a las Invitadas con el mismo Transaction ID que se encuentra en la petición DHCP. Esto permite que la codificación de datos se envíe por medio del router hacia el campo Transaction ID de 32 bits.